Unverified50% confidenceFactExact time
A pure function is a function that always returns the same output for the same input and produces no observable side effects: it does not modify external state, does not read or write files or databases, does not make network requests, and does not write logs.
1
Sources
50%
Confidence
Long-term
Relevance
10/16/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedThe noexcept operator and the noexcept specifier are two distinct language mechanisms; the operator returns a compile-time boolean indicating whether an expression is declared as non-throwing, without executing the function body.62% similarUnverifiedCompilers frequently insert ud2 when generating unreachable code, such as in cases where a noreturn function returns unexpectedly or a switch branch that is never hit.59% similarUnverifiedIn C++, noexcept is the most common form of exception specification; appending the noexcept keyword after a function declaration means the function promises not to throw exceptions.59% similarUnverifiedUndefined behavior (UB) in the C standard allows an implementation to do anything when it encounters that behavior, including producing seemingly correct output, crashing, silently corrupting data, or deleting the relevant code entirely after optimization.57% similarUnverifiedVariable scope is a fundamental mechanism of programming languages, governing where in the code a variable can be accessed; most languages use block-level or function-level scope, variables defined inside a function are by default invisible outside it, and cross-function references throw an undefined error that halts the script.56% similar
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